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২টি প্রশ্ন: 'had better' + verb form, and gerund after preposition.
'Travellers ---- their reservation well in advance.'
Answer: গ) had better get ✓
'had better' is followed by the bare infinitive (verb without 'to'). Never 'had better to V', never 'had better V-ing', never 'had better V-ed'.
Right: You had better go now. Wrong: You had better to go / had better going / had better went.
| Trigger | + verb form |
|---|---|
| had better | bare infinitive |
| would rather | bare infinitive |
| would sooner | bare infinitive |
| must / shall / will / can / may | bare infinitive |
| let / make / bid / have (causative) | bare infinitive |
| see / hear / watch / feel (perceive) | bare infinitive or -ing |
'Had better to get' looks polite/right because we say 'I want to get' — but 'had better' is modal, modals never take 'to'.
'... a good way to improve listening skills is by watch television.'
Answer: ঘ) watch (4) — should be 'by watching'.
After a preposition (by, of, in, for, after, before, without, about), use the gerund (-ing), not the base verb.
Right: by watching / by reading / by listening. Wrong: by watch / by read / by listen.
| Preposition | Gerund example |
|---|---|
| by | by working hard |
| of | tired of waiting |
| in | interested in learning |
| for | thank you for coming |
| after | after eating |
| before | before sleeping |
| without | without saying |
| about | thinking about leaving |
'To' can be either preposition (+ gerund) or infinitive marker (+ base verb). Memorize the preposition cases:
looking forward to seeing, accustomed to working, dedicated to helping.
Scan for 'by/after/before/without/of' followed by base verb → that's the error.
Right Form of Verbs — Master Lecture — full table of verb forms after modals, semi-modals, gerunds vs infinitives, causative verbs, perception verbs, and 200+ BCS-favourite patterns.